They say Iraq is the laboratory that will show the depth and effectiveness of the shift.

No treatment is yet known, but ribavirin has shown effectiveness in an animal model.

Various other drugs have shown limited effectiveness in small studies.

In an animal model, it has shown effectiveness when given intramuscularly.

On the down side is the fact that such attacks have not shown much effectiveness as deterrents.

Nowadays, they usually have to show effectiveness for at least one drug in clinical trials.

Human testing to show effectiveness is required for all drugs.

More recent studies have shown greater effectiveness in how screening has reduced the prostate cancer death rate.

Those have really shown effectiveness for psoriasis and I always recommend them.

"When you're No. 3, you have to work a lot harder to show effectiveness," he said.